ATMEGA162V-8AU View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
ATMEGA162V-8AU
Atmel Corporation
ATMEGA162V-8AU Datasheet PDF : 324 Pages
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2513K–AVR–07/09
Figure 19. Crystal Oscillator Connections
C2
C1
ATmega162/V
XTAL2
XTAL1
GND
The Oscillator can operate in four different modes, each optimized for a specific frequency
range. The operating mode is selected by the fuses CKSEL3:1 as shown in Table 7.
Table 7. Crystal Oscillator Operating Modes
CKSEL3:1
100(1)
101
110
111
Frequency Range
(MHz)
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
8.0 -
Recommended Range for Capacitors C1 and
C2 for Use with Crystals (pF)
–
12 - 22
12 - 22
12 - 22
Note: 1. This option should not be used with crystals, only with ceramic resonators.
The CKSEL0 Fuse together with the SUT1..0 Fuses select the start-up times as shown in Table
8.
Table 8. Start-up Times for the Crystal Oscillator Clock Selection
CKSEL0 SUT1:0
0
00
Start-up Time from
Power-down and
Power-save
258 CK(1)
Additional Delay from
Reset (VCC = 5.0V)
4.1 ms
0
01
0
10
0
11
1
00
258 CK(1)
1K CK(2)
1K CK(2)
1K CK(2)
65 ms
–
4.1 ms
65 ms
1
01
16K CK
–
1
10
16K CK
4.1 ms
1
11
16K CK
65 ms
Recommended
Usage
Ceramic resonator,
fast rising power
Ceramic resonator,
slowly rising power
Ceramic resonator,
BOD enabled
Ceramic resonator,
fast rising power
Ceramic resonator,
slowly rising power
Crystal Oscillator,
BOD enabled
Crystal Oscillator,
fast rising power
Crystal Oscillator,
slowly rising power
37
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